Search Again: Re: Multiple IPs for one address ? From: Men & Mice Support Date: Friday, March 7, 2003 Time: 2:06:31 pm The solution described below is very common. Don't be ashamed of it. :-) Of course, BGP provides a better solution from a technical standpoint. But it's also more expensive and more complex to set up. ____________________________________________________________________ Chris Buxton Men & Mice support@menandmice.com Making DNS Easy At 11:27 PM -0600 3/5/03, Richard Davis wrote: > >Folks, >> >>I guess this is essentially a "pure" DNS question but... Is it possible, >>using QDNS with OS X BIND, to attribute more than one IP for a given >>name ? >> >>Say I have www.myorg.com and two different inbound routers to my web >>server (for redundancy purposes). How do I manage that ? > >I know this is not being a very good net citizen but... > >I have a DNS server on each inbound set of IPs. >One registered as primary, the other as secondary. >Both are set as master DNS servers so they do not sync. >I set the TTLs on both to 600 so... >If the primary connection fails, >after 10 minutes the secondary DNS provides it's IP and >route to the server. > >My servers do not see too much traffic so the extra incoming DNS >traffic to refresh other DNS caches after only 10 minutes is not too bad. > >I also realize that sometimes the dns will resolve from the secondary DNS >server instead of the primary. But since both connections are full time and >point to basically the same server it is not an issue. > >I set the exact same multiple MX records for both master servers as MX >records already provide a redundancy record.

Messages In This Thread: Multiple IPs for one address ? by Alexandre Takacs on Mar 5, 2003 at 2:18:31 pm Re: Multiple IPs for one address ? by Richard Davis on Mar 5, 2003 at 9:28:36 pm Re: Multiple IPs for one address ? by Alexandre Takacs on Mar 6, 2003 at 8:36:22 am Re: Multiple IPs for one address ? by Richard Davis on Mar 6, 2003 at 10:47:16 am Re: Multiple IPs for one address ? by Men & Mice Support on Mar 7, 2003 at 2:06:31 pm